Thanks, herf. Light meter app says about 160 lux at the moment, it's night time and I have a lamp, candle, and three screens. I've used the slider, but it always turns down the brightness along with the hue. I also just calibrated the monitor's brightness and contrast. Nothing I adjust seems to alter tone without also losing brightness. I have to bring the monitor's brightness all the way up once f.lux is started in order to see things well enough.

Also, something about the slider doesn't seem to work properly - I just barely bring the slider down and there's a big decrease but when I bring it back up, the light doesn't return to the previous level.

@Kevin-Brewton
honestly to get any more brightness you would need to not use flux and use a 4400k - 3400k icc profile
the transforms that f.lux use reduce brightness more then a optimized (for this purpose) icc for an certain white point (5 - 15%)

also panels get dimmer the further away you move from native white
my panel has a native white that is above 7200k (due to the very very cool led backlight)

Also, something about the slider doesn't seem to work properly - I just barely bring the slider down and there's a big decrease but when I bring it back up, the light doesn't return to the previous level.

Also, something about the slider doesn't seem to work properly - I just barely bring the slider down and there's a big decrease but when I bring it back up, the light doesn't return to the previous level. HostGatorDreamHostBluehost